diff --git a/CHANGES.rst b/CHANGES.rst
index 71d8e30..84123f4 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,6 +1,13 @@
 Change History
 **************
 
+0.8.3 (2023-05-03)
+==================
+
+Changes:
+
+* Added the `packaging` library to the list of requirements.
+
 0.8.2 (2023-04-28)
 ==================
 
diff --git a/environment-docs.yml b/environment-docs.yml
index 478667f..420dbfc 100644
--- a/environment-docs.yml
+++ b/environment-docs.yml
@@ -4,6 +4,6 @@ channels:
   - conda-forge
   - defaults
 dependencies:
-  - sphinx
   - ipython
   - nbsphinx
+  - sphinx
diff --git a/environment.yml b/environment.yml
index 9913fc2..e07da5d 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,24 +6,25 @@ channels:
 dependencies:
   - pip
   #- openssl
-  - lxml
-  - owslib>=0.19
+  - boltons
   - click
+  - funcsigs
   - jinja2
+  - lxml
+  - owslib>=0.19
+  - packaging
   - wrapt
-  - funcsigs
-  - boltons
   # optional
   - netcdf4
   - xarray
   # tests
+  - flake8>=3.8.4
+  - nbval
   - pytest
   - pytest-notebook
-  - nbval
-  - flake8>=3.8.4
   # sphinx for rtd
-  - pandoc
   - ipykernel
-  - sphinx
-  - nbsphinx
   - nbconvert
+  - nbsphinx
+  - pandoc
+  - sphinx
diff --git a/requirements.txt b/requirements.txt
index b0f3744..a2a150a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,9 +1,10 @@
+boltons
 click
+funcsigs
 jinja2
 lxml
 owslib>=0.19.2
+packaging
+python-dateutil>=2.8.1
+requests>=2.0
 wrapt
-funcsigs
-boltons
-requests
-python-dateutil
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 78edb8c..96b9c67 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,18 +1,18 @@
-pip>=20.0
+black>=20.8b1
 bumpversion>=0.5.3
-wheel>=0.32.1
-twine>=1.12.1
-watchdog>=0.9.0
-flake8>=3.8.4
-tox>=3.5.2
 coverage>=4.5.1
-pre-commit>=2.7.1
-black>=20.8b1
-Sphinx>=1.8.1
-nbsphinx>=0.7.0
+flake8>=3.8.4
 ipykernel
 nbconvert
+nbsphinx>=0.7.0
+nbval>=0.9.6
 pandoc
-pytest>=3.8.2
+pip>=20.0
+pre-commit>=2.7.1
 pytest-runner>=4.2
-nbval>=0.9.6
+pytest>=3.8.2
+sphinx>=1.8.1
+tox>=3.5.2
+twine>=1.12.1
+watchdog>=0.9.0
+wheel>=0.32.1
diff --git a/requirements_extra.txt b/requirements_extra.txt
index 8b3072d..4e70f98 100644
--- a/requirements_extra.txt
+++ b/requirements_extra.txt
@@ -1,9 +1,9 @@
-netCDF4
+fiona
+geojson
 ipyleaflet
-ipywidgets
 ipython
-geojson
+ipywidgets
+netCDF4
 pymetalink
-fiona
 rasterio
 rioxarray